So I decided to add self-hosted video support on my new theme, but I have faced a limitation: I can’t upload files with more than 1MB into the WordPress Media Library. After doing some research here’s what I needed to do:
a) Because I’m running a multisite installation I had to do this:
1. At the top My Sites>Network Admin
2. At the left Settings>Network Settings
3. Scroll to the bottom of the page and change the Max upload file size in KB
4. Save Changes
If after these changes you still have a different limit it should be coming from PHP. In this case the best thing to do is contacting your hosting company. Here are 2 useful links related with this matter: